[Xml] Set totalItems if total_count missing

Author: zapadi

src/redmine-net-api/Serialization/Xml/XmlRedmineSerializer.cs

@@ -27,7 +27,7 @@ namespace Redmine.Net.Api.Serialization
     internal sealed class XmlRedmineSerializer : IRedmineSerializer
     {
 
-        public XmlRedmineSerializer(): this(new XmlWriterSettings
+        public XmlRedmineSerializer() : this(new XmlWriterSettings
         {
             OmitXmlDeclaration = true
         }) { }
@@ -126,6 +126,11 @@ public string Serialize<T>(T entity) where T : class
                     var limit = xmlReader.ReadAttributeAsInt(RedmineKeys.LIMIT);
                     var result = xmlReader.ReadElementContentAsCollection<T>();
 
+                    if (totalItems == 0 && result.Count > 0)
+                    {
+                        totalItems = result.Count;
+                    }
+
                     return new PagedResults<T>(result, totalItems, offset, limit);
                 }
             }